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Implement async generators (#3916)

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JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-06-22 13:54:18 +02:00
committed by GitHub
parent 0f0041d720
commit b2a6109430
32 changed files with 1247 additions and 50 deletions
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jerry-core/vm/vm.c
+60
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@@ -482,6 +482,11 @@ vm_construct_literal_object (vm_frame_ctx_t *frame_ctx_p, /**< frame context */
func_obj_p = ecma_op_create_generator_function_object (frame_ctx_p->lex_env_p, bytecode_p);
break;
}
case CBC_FUNCTION_ASYNC_GENERATOR:
{
func_obj_p = ecma_op_create_async_generator_function_object (frame_ctx_p->lex_env_p, bytecode_p);
break;
}
case CBC_FUNCTION_ARROW:
{
func_obj_p = ecma_op_create_arrow_function_object (frame_ctx_p->lex_env_p,
@@ -2190,6 +2195,37 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
frame_ctx_p->stack_top_p = --stack_top_p;
return *stack_top_p;
}
case VM_OC_ASYNC_YIELD:
{
const uintptr_t object_offset = (uintptr_t) offsetof (vm_executable_object_t, frame_ctx);
ecma_extended_object_t *async_generator_object_p;
async_generator_object_p = (ecma_extended_object_t *) (((uintptr_t) frame_ctx_p) - object_offset);
ecma_async_generator_task_t *task_p;
task_p = ECMA_GET_INTERNAL_VALUE_POINTER (ecma_async_generator_task_t,
async_generator_object_p->u.class_prop.u.head);
ecma_value_t iter_result = ecma_create_iter_result_object (stack_top_p[-1], ECMA_VALUE_FALSE);
ecma_fulfill_promise (task_p->promise, iter_result);
ecma_free_value (iter_result);
ecma_free_value (stack_top_p[-1]);
async_generator_object_p->u.class_prop.u.head = task_p->next;
if (!ECMA_IS_INTERNAL_VALUE_NULL (task_p->next))
{
ecma_value_t executable_object = ecma_make_object_value ((ecma_object_t *) async_generator_object_p);
ecma_enqueue_promise_async_generator_job (executable_object);
}
JERRY_ASSERT (task_p->operation_value == ECMA_VALUE_UNDEFINED);
jmem_heap_free_block (task_p, sizeof (ecma_async_generator_task_t));
frame_ctx_p->call_operation = VM_EXEC_RETURN;
frame_ctx_p->byte_code_p = byte_code_p;
frame_ctx_p->stack_top_p = --stack_top_p;
return ECMA_VALUE_UNDEFINED;
}
case VM_OC_AWAIT:
{
ecma_value_t promise = ecma_make_object_value (ecma_builtin_get (ECMA_BUILTIN_ID_PROMISE));
@@ -2239,6 +2275,30 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
return result;
}
case VM_OC_GENERATOR_AWAIT:
{
ecma_value_t promise = ecma_make_object_value (ecma_builtin_get (ECMA_BUILTIN_ID_PROMISE));
ecma_value_t argument = *(--stack_top_p);
result = ecma_promise_reject_or_resolve (promise, argument, true);
ecma_free_value (argument);
if (ECMA_IS_VALUE_ERROR (result))
{
goto error;
}
frame_ctx_p->call_operation = VM_EXEC_RETURN;
frame_ctx_p->byte_code_p = byte_code_p;
frame_ctx_p->stack_top_p = stack_top_p;
const uintptr_t object_offset = (uintptr_t) offsetof (vm_executable_object_t, frame_ctx);
ecma_object_t *object_p = (ecma_object_t *) (((uintptr_t) frame_ctx_p) - object_offset);
ecma_promise_async_then (result, ecma_make_object_value (object_p));
ecma_free_value (result);
return ECMA_VALUE_UNDEFINED;
}
case VM_OC_EXT_RETURN:
{
result = left_value;